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    v853 开发板 使用 i2cdetect 检查 i2c 设备，报错 incomplete xfer status: 0x48,

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    • W
      wxid_disxysjskla LV 5 last edited by

      V853 的所有 i2c 测试都是这样的错误，但是设备又是正常使用的，摄像头也是正常的。

      之前在v831上也遇到过这个问题

      root@TinaLinux:/# i2cdetect -l
i2c-0   i2c             twi0                                    I2C adapter
i2c-1   i2c             twi1                                    I2C adapter
i2c-2   i2c             twi2                                    I2C adapter
i2c-3   i2c             twi3                                    I2C adapter
i2c-4   i2c             twi4                                    I2C adapter

      测试指令：

      root@TinaLinux:/# i2cdetect -y -r 0

      报错。

           0  1  2  3  4  5  6  7  8  [  115.384854] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x8)
9  a  b  c  d  e  f
00:        [  115.397002] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x9)
                 -- [  115.409100] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0xa)
-- -- [  115.420038] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0xb)
-- [  115.429774] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0xc)
-- [  115.439425] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0xd)
-- [  115.449238] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0xe)
-- [  115.458871] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0xf)
--
10: [  115.468484] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x10)
-- [  115.478725] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x11)
-- [  115.488403] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x12)
-- [  115.498150] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x13)
-- [  115.507783] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x14)
-- [  115.517525] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x15)
-- [  115.527204] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x16)
-- [  115.536938] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x17)
-- [  115.546696] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x18)
-- [  115.556442] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x19)
-- [  115.566120] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x1a)
-- [  115.575860] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x1b)
-- [  115.585540] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x1c)
-- [  115.595306] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x1d)
-- [  115.604980] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x1e)
-- [  115.614720] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x1f)
--
20: [  115.624423] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x20)
-- [  115.634657] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x21)
-- [  115.644333] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x22)
-- [  115.654066] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x23)
-- [  115.663783] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x24)
-- [  115.673600] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x25)
-- [  115.683283] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x26)
-- [  115.693030] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x27)
-- [  115.702712] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x28)
-- [  115.712452] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x29)
-- [  115.722156] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x2a)
-- [  115.731898] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x2b)
-- [  115.741577] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x2c)
-- [  115.751314] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x2d)
-- [  115.760992] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x2e)
-- [  115.770727] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x2f)
--
30: [  115.780423] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x30)
-- [  115.790658] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x31)
-- [  115.800404] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x32)
-- [  115.810162] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x33)
-- [  115.819856] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x34)
-- [  115.829599] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x35)
-- [  115.839278] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x36)
-- [  115.849042] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x37)
-- [  115.858714] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x38)
-- [  115.868454] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x39)
-- [  115.878135] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x3a)
-- [  115.887835] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x3b)
-- [  115.897520] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x3c)
-- [  115.907259] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x3d)
-- [  115.916941] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x3e)
-- [  115.926676] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x3f)
--
40: [  115.936449] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x40)
-- [  115.946696] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x41)
-- [  115.956373] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x42)
-- [  115.966113] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x43)
-- [  115.976119] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x44)
-- [  115.985738] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x45)
-- [  115.995480] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x46)
-- [  116.005160] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x47)
-- [  116.014896] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x48)
-- [  116.024570] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x49)
-- [  116.034306] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x4a)
-- [  116.043980] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x4b)
-- [  116.053713] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x4c)
-- [  116.063464] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x4d)
-- [  116.073224] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x4e)
-- [  116.082905] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x4f)
--
50: [  116.092670] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x50)
-- [  116.102897] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x51)
-- [  116.112603] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x52)
-- [  116.122342] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x53)
-- [  116.132027] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x54)
-- [  116.141761] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x55)
-- [  116.151440] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x56)
-- [  116.161175] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x57)
-- [  116.170853] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x58)
-- [  116.180586] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x59)
-- [  116.190322] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x5a)
-- [  116.200080] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x5b)
-- [  116.209757] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x5c)
-- [  116.219525] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x5d)
-- [  116.229204] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x5e)
-- [  116.238971] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x5f)
--
60: [  116.248676] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x60)
-- [  116.258902] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x61)
-- [  116.268579] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x62)
-- [  116.278314] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x63)
-- [  116.287964] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x64)
-- [  116.297658] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x65)
-- [  116.307341] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x66)
-- [  116.317073] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x67)
-- [  116.326823] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x68)
-- [  116.336581] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x69)
-- [  116.346327] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x6a)
-- [  116.356087] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x6b)
-- [  116.365767] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x6c)
-- [  116.375534] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x6d)
-- [  116.385214] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x6e)
-- [  116.394960] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x6f)
--
70: [  116.404662] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x70)
-- [  116.414896] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x71)
-- [  116.424572] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x72)
-- [  116.434313] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x73)
-- [  116.443985] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x74)
-- [  116.453798] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x75)
-- [  116.463480] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x76)
-- [  116.473222] sunxi_i2c_do_xfer()1974 - [i2c0] incomplete xfer (status: 0x48, dev addr: 0x77)
--
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      • whycan
        whycan晕哥 LV 9 last edited by whycan

        又一个被骗的，那个只是提示信息，不是错误信息。

        把loglevel的等级提高估计没了。

        W 1 Reply Last reply Reply Quote Share 0
        • W
          wxid_disxysjskla LV 5 @whycan last edited by

          @whycan 学到了，可以关掉这个打印吗

          whycan 1 Reply Last reply Reply Quote Share 0
          • whycan
            whycan晕哥 LV 9 @wxid_disxysjskla last edited by

            @wxid_disxysjskla
            可以的，grep一下代码，暴力一点就直接注释起来。

            文明一点就看下是不是受什么宏控制，把宏定义开启或者关闭。

            W 1 Reply Last reply Reply Quote Share 0
            • W
              wxid_disxysjskla LV 5 @whycan last edited by wxid_disxysjskla

              @whycan

              kernel/linux-4.9/drivers/i2c/busses/i2c-sunxi.c L1973 加了一个判断，drop掉 0x48 错误

              if(ret != 0x48){
	I2C_ERR("[i2c%d] incomplete xfer (status: 0x%x, dev addr: 0x%x)\n",
			i2c->bus_num, ret, msgs->addr);
}
              W 1 Reply Last reply Reply Quote Share 0
              • W
                wonderfullook LV 3 @wxid_disxysjskla last edited by

                @wxid_disxysjskla 建议用 && 来判断，避免丢失了别的错误信息

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